It is hard to describe, but I share the same feelings of the author when it comes to expressing love, affection or sadness. It's strange and hard to describe, even though we also use the SHG "lieben", but it still doesn't feel right if we are trying to speak in "Pfälzisch" about it.
Not only that, but it's odd, and it looks like they took and maintained the same sentiments we had 150 years ago and still use and share today.
Oh, that's interesting. The same thing happens in Spanish, where "amar" is used exclusively for romantic relationships, while "querer" is used for everything else (e.g. the love between family members, between an owner and his pet, etc.), and "encantar" is used for intense liking of things and activities ("me encantan los mariscos" -> "I love shellfish").
I wonder if there's an equivalent for 喜欢 in Japanese.